Pressing machine



March 4,1930. 5. T. HART Re. 17,619

PRES SING MACHINE Original Filed June 18, 1924 2 Sheets-Sheet 1INVENTOR.

A TTORNE Y5 5. T. HART March 4, 1930.

PRESSING MACHINE Original Filed June 18, 1924 2 sheets-sheet 2 1 N V ENTOR.

@WW fflf/w A TTORNEYS Reissued' Ms; .4, i930 UNITED STATES PATENT orrlcaamazon '1'. man, or smcusa, r'rnw YORK, assrcmon. ro rnn'rnosrnnrrv oourm, me, A coarom'rron ornnw YORK rnnssme mom Original 1T0. 1,580,026,dated June 22, 1826, Serial Il'o. 720,854, filed .Tune 18, 1924.Application for reissue m r m 24, 1929.

This'invntion relates to presses, such as garment and laundry presses,and has-for its object a particularly simple and efiicient motiontransmitting or to 1e mechanism between the power lever and e movableele- .ment, or head of the press, by which mechanism the application ofpower to the press he'ad canbe effectively applied, only after areliminary closing movement of the press cad independently of the powermechanism, and by which shocks and jars and stalling and breaking of themachine is prevented in case the power is applied when the links are atI or in the neighborhood of a dead center 16 point, and also by whichundue strains on the machine are-prevented. I

The inventib'n consists in the novel features and in the combinationsand constructionshereinafter setforth and claimed. 'In' describing thisinvention reference is had to the accompanying drawings inwhich likecharacters designate corresponding parts in all the views. r

Figure 1 is a side elevation of the machine embodying my invention.

Figure 2 is a detail view of'one of the links and the toggle. 1

Figures 3 and 4 are views similar to Figures 1 and 2, part 3 beingomitted,.sh'owing $0 the position of the linkage when the machine isunderfinal pressure and when-the mechanism is at a neutral point,

This pressing machine comprises, generally, cooperating pressingelements one of which is movabletoward and from the other, andactuating-means therefor, including a power member, togglelinks, onebelng connected to the mova le element and the. other to the frameindependently of the power member, and the latter includin endwiselymovable sections, and a spring or resisting endwise movement of thesections, and 'a-connection between the power member and the togglenormally arranged when the press. is

open, in ineffective osition, and arranged to be moved to efi'ectlveposition by the preliminary closing of the press by the operator,

-inde endently of the power member. I

I ave here shown my invention as em-v bodied in a tandard fo m f garme tand Serial No. 880,737.

laundry press, comprising a stationary presslng element or buck 1, amovable pressing element or head 2 movabletoward. and from the buck 1,the buck 1 being mounted upon a bracket 3, which in turn main frame 4.

The pressing elements and the frame may be ofany suitable size andconstruction, the frame including legs or pedestals 5 and 6.

The head 2 is usually carried by a yoke is mounted upon the or lever 7pivoted between its ends at 8 to ae standard 9, forming an extension ofthe rear leg 6 of the frame, the lever 7 extending forwardly andrearwardly and carrying the head 2 on its front arm, and a suitablecounter weight 10 on its rear arm. The yoke 7 is also provided with ahandle 11 at its front end by means of which the head ispreliminarilymoved toward closed position.

,The power member is usually a lever 12 pivoted between its ends at 13to the frame near the base thereof, and near or in the verticalline ofthe 'pivot 8, the power lever also extending forwardly and rearwardly.

14 is-a toggle link pivotally connected to 16 is a toggle link pivotedat one end at 17 to. the link 14, and at its other end to the frameindependently of the power lever, it being here illustrated as normallyextending downwardly and forwardly from the link 14 when the press isopen, and as pivoted on the same pivot 13 that the power lever 12 ismounted. This link 16 comprises endwisely movable sections 18 and 19,slidable relatively to each other, one section as 18 having a guide asaplate 20 on one side thereof, and the other having a complemental rib orguide 21 slidable in the guide 20. Endwise movement of the'sections 18and 19 is against theaction of a compression spring 22, which thrusts atone end against the shoulder .23 on the section 19, and at its other endagainst a shoulder 24 on a rod 25 secured at 26 to the section 18 andextending through the shoulder23 and through the spring 22, the rod 25the head 2 through the lever 7, it being here having its end 25 guidedin a lug'27 on the section 19.

The connections between the power lever 12 i and the toggle, comprises alink 28, pivotally nary) closing movement by the operator efiected ylink 28.

pulling down on the handle 11. The link 28 normally extends rearwardlyhorizontally in the same general direction as the tog- I gle link 16, sothat, it will idle during the preliminary closin movement or will idleif power is applied to the lever 12 before or during such preliminaryclosing movement.- Preferably the rear arm of the power lever 12, and isconnected to an extension 30 of the link 14 by a pin and slotconnection, the pin 31 being provided on the link 14 below the joint 17of the toggle, and the slot 32 being provided in the Owing to therelative arrangement of the links 16-and 28, the link 28 is carried intoa straightened or effective position before the toggle links 14 and 16are in an effective straightened position; and hence, when power isapplied to the power lever 12 when the link 28 is in straightenedposition, the toggle links 14 and 16 will be moved further intoeffective straightened position and apply pressure to the press head.The arrangement of the links 14, 16 and 28 is such that the link 28 doesnot come into effective position until the head 2 has been preliminarilybrought down to a position close to the work on the buck 1, that is,'towhat is called, a safety-first position.

Thelink 14 is provided with the usual ad justment for lengthening orshortening it to conform to the thickness of the work and the amount ofpressure desired, and includes endwisely movable adjustable sections,which are adjusted by means of a wheel 33. As such adjustment by thewheel 33 is well known, further description is thought to beunnecessary.

In operation when the power lever 12 is depressed after the head hasbeen preliminarily closed, the link 28 will cause the toggles 14 and 16to move further toward their dead-center line and apply heavy pressure.In the event the lever 12 is depressed at any other time the link 28will merely idle. If it is depressed when the head is but part wayclosed, the head 2 will open up under the influence of the weight 10,unless the operator is holding on to the handle 11. If this lever 12 isdepressed when the links 14 and 16 are in a neutral pointwhere the jointof the toggle willnot move forwardly or rearwardly, the link 28 Vthrusting against or endwise on the link 14 owing to the pin 31 being atthe inner or lower end of the slot 32, causes the sections of the link28 is pivoted at 29 to the link 16 to pull apart againstthe action ofthe I avoid stalling of the ma- 7 of the parts in case the adj ustmentof thelinks so 14 and 16 with respect to such neutral or dead-centerpoint is not accurate. Owing to the'links 16 no controllingmeans forpreventing the operation'of thehead 2 is neces- The power lever 12 maybe actuated in any suitable manner, and as here illustrated it isactuated by an intermittently movable shaft 34 having an eccentric orcam 35 thereof co-.

acting with face 36 on the front end of the lever 12, the shaft 34 beingintermittently actuated from a constantly running electric motor 37, theshaft 38 of which is connected to the shaft 34 through suitable gearingand in--. termittent clutch mechanism located within the housing 39.

The clutch may shown in Patent No. 1,599,115 to Albert B. Clissongranted September 7, 1926. The clutch is controlled by a handle 53.

be of the construction The lever 12 is caused to follow the cam by p asuitable spring 61.

- The construction and operation of the driving clutch mechanism formsno part of thisinvention, it being suflicient to bear in'mind that theshaft 34 is intermittently movable V ,and is connected to the powermanually, and

disconnected automatically at the end of each half revolution. Y

Assuming that the parts are in the position shown in Fig. 1, theoperator first preliminarily closes the press, then operates the bandle53 causing the shaft 34 to make a half revolution moving the eccentric35 from its position shown in Fig. 1, through a half revolution, thusdepressing the power lever 12 and applying pressure to the head 2. Whenthe pressure has been applied as long as desired, the operator againpresses the handle 53 causing the clutch mechanism to connect the shaft34 to the driving mechanism during another half revolution until theeccentric 35 moves to its position shown in Fig. 1, and the'parts are intheir starting position. a

What I claim is: v j v 1. A pressing machine comprising a frame,cooperating pressing elements, one movable toward and from the other,and actuating means for the movable pressing element, comprising a powermember, a toggle comprising links pivotally connected respectively tothe movable element and to the frame independently of the power member,the latter' com prising endwisely 'movable sections, and a spring forresisting such endwise movement, and a connection between the powermember and the toggle normally arranged in ineffective position andmovable into effective position by a preliminary closing movement of themovable element independently of the power member, said connection beingconnected to the toggle to move the toggle toward final straightenedosition and to extend the sectional toggle ink against the action of itss ring when the straightening movement the toggle is obstructedbeforethe toggle reaches its straightened position. 2. A pressingmachine comprisin a frame, cooperating pressing elements carried by theframe, a forwardly and rearwardly extending lever su porting the movableelement, said lever belng pivoted between its ends to the frame, aforwardly and rearwardly extending power lever pivoted between its endsto the frame below the power lever, a toggle comprisin a link pivoted tothe rear arm of the first ever and extending downwardly therefrom, and asecond link ivoted to the first-link and to the frame, an normallyextending downwardly and forwardly from the first link, the second linkcomprisin endwisely movable sections and a sprin or resisting endwisemovement of the sections, and 30 a link pivoted to the rear arm of thepower lever in the rear of the pivot ofthe second v link, and to thefirst link below the joint of the toggle, it being connected to one ofthe parts it connects by a lost motion connection. 35 In testimonywhereof, I have hereunto I si ed m name, at Syracuse, in the county 0Onon aga, and State of New York, this th day of June, 1929. I

SIMEON T. HART.

